package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @author xmy
 * @version 1.0
 */
@Slf4j
@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatProperties weChatProperties;
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";
    /**
     * 微信登陆
     * @param loginDTO
     * @return
     */
    public User wxLogin(UserLoginDTO loginDTO) {
        //获得当前微信用户openid
        String openid=getOpenid(loginDTO.getCode());

        //判断openid是否为空，为空则抛出异常
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断是否为新用户
        User user=userMapper.getByOpenId(openid);
        if(user==null){

            user=User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            log.info("user信息：{}",user);
            userMapper.insert(user);
        }
        return user;
    }

    private String getOpenid(String code){
        Map<String, String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String httpClientUtil=HttpClientUtil.doGet(WX_LOGIN,map);
        JSONObject jsonObject=JSONObject.parseObject(httpClientUtil);
        String openid=jsonObject.getString("openid");
        return openid;
    }
}
